[Haskell-cafe] FunPtr error?
vigalchin at gmail.com
Sat Jun 14 01:59:31 EDT 2008
If I change
data Sigval = SivalInt Int | SivalPtr (Ptr Char)
newtype Sigval = Sivalint Int | SivalPtr (Ptr Char)
then my test case builds and links. ??
On Mon, Jun 9, 2008 at 11:01 PM, Galchin, Vasili <vigalchin at gmail.com>
> I have tried various things to no avail ....
> vigalchin at ubuntu:~/FTP/Haskell/unix-126.96.36.199/tests/timer$ runhaskell
> Setup.lhs build
> Preprocessing executables for Test-1.0...
> Building Test-1.0...
> [1 of 1] Compiling Main ( ./timer.hs,
> dist/build/timer/timer-tmp/Main.o )
> Unacceptable argument type in foreign declaration: Sigval
> When checking declaration:
> foreign import ccall safe "wrapper" mkNotify
> :: Notify -> IO (FunPtr Notify)
> => here is my Sigval def
> data Sigval = SivalInt Int | SivalPtr (Ptr Char)
> I did a find/grep for "Unacceptable argument" in the ghc compiler source
> and assuming no typo I didn't find. ??
> Kind regards, Vasili
> On Mon, Jun 9, 2008 at 11:25 PM, Judah Jacobson <judah.jacobson at gmail.com>
>> 2008/6/9 Galchin, Vasili <vigalchin at gmail.com>:
>> > Ryan,
>> > I tried but the compiler didn't seem to like the keyword "import":
>> > vigalchin at ubuntu:~/FTP/Haskell/unix-188.8.131.52/tests/timer$ runhaskell
>> > Setup.lhs build
>> > Preprocessing executables for Test-1.0...
>> > Building Test-1.0...
>> > [1 of 1] Compiling Main ( ./timer.hs,
>> > dist/build/timer/timer-tmp/Main.o )
>> > ./timer.hs:29:8: parse error on input `import'
>> Hi Vasili,
>> To fix that error, you probably just need to add the line "Extensions:
>> ForeignFunctionInterface" to the .cabal file. (That is the
>> equivalent of calling ghc by itself with the command-line arguments
>> -fffi or -XForeignFunctionInterface.)
>> Hope that helps,
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